On Wed, Sep 16, 2020 at 04:18:27PM +0800, Ran Wang wrote: > From: Biwen Li <biwen.li@xxxxxxx> > > The 'fsl,ippdexpcr1-alt-addr' property is used to handle an errata A-008646 > on LS1021A > > Signed-off-by: Biwen Li <biwen.li@xxxxxxx> > Signed-off-by: Ran Wang <ran.wang_1@xxxxxxx> > --- > Documentation/devicetree/bindings/soc/fsl/rcpm.txt | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) > > diff --git a/Documentation/devicetree/bindings/soc/fsl/rcpm.txt b/Documentation/devicetree/bindings/soc/fsl/rcpm.txt > index 5a33619..1be58a3 100644 > --- a/Documentation/devicetree/bindings/soc/fsl/rcpm.txt > +++ b/Documentation/devicetree/bindings/soc/fsl/rcpm.txt > @@ -34,6 +34,11 @@ Chassis Version Example Chips > Optional properties: > - little-endian : RCPM register block is Little Endian. Without it RCPM > will be Big Endian (default case). > + - fsl,ippdexpcr1-alt-addr : The property is related to a hardware issue > + on SoC LS1021A and only needed on SoC LS1021A. > + Must include 2 entries: > + The first entry must be a link to the SCFG device node. > + The 2nd entry must be offset of register IPPDEXPCR1 in SCFG. You don't need a DT change for this. You can find SCFG node by its compatible string and then the offset should be known given this issue is only on 1 SoC. Rob
